OA04837A - Circuit d'essai à distance des postes téléphoniques à fréquence porteuse. - Google Patents

Circuit d'essai à distance des postes téléphoniques à fréquence porteuse.

Info

Publication number
OA04837A
OA04837A OA55330A OA55330A OA04837A OA 04837 A OA04837 A OA 04837A OA 55330 A OA55330 A OA 55330A OA 55330 A OA55330 A OA 55330A OA 04837 A OA04837 A OA 04837A
Authority
OA
OAPI
Prior art keywords
carrier frequency
test circuit
telephone sets
remote test
frequency telephone
Prior art date
Application number
OA55330A
Other languages
English (en)
Original Assignee
Seismograph Service Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seismograph Service Corp filed Critical Seismograph Service Corp
Publication of OA04837A publication Critical patent/OA04837A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/02—Selecting arrangements for multiplex systems for frequency-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Devices For Supply Of Signal Current (AREA)
OA55330A 1973-10-29 1974-10-28 Circuit d'essai à distance des postes téléphoniques à fréquence porteuse. OA04837A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00410745A US3840706A (en) 1973-10-29 1973-10-29 Remote test circuit for carrier telephones

Publications (1)

Publication Number Publication Date
OA04837A true OA04837A (fr) 1980-10-31

Family

ID=23626041

Family Applications (1)

Application Number Title Priority Date Filing Date
OA55330A OA04837A (fr) 1973-10-29 1974-10-28 Circuit d'essai à distance des postes téléphoniques à fréquence porteuse.

Country Status (8)

Country Link
US (1) US3840706A (fr)
JP (1) JPS5734715B2 (fr)
AR (1) AR206613A1 (fr)
BR (1) BR7408869D0 (fr)
CA (1) CA1000880A (fr)
GB (1) GB1450978A (fr)
IL (1) IL45761A (fr)
OA (1) OA04837A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5299008A (en) * 1976-02-16 1977-08-19 Toshiba Corp Calling signal system
US4045624A (en) * 1976-04-02 1977-08-30 Carrier Telephone Corporation Of America, Inc. Continuous monitoring in carrier telephone systems
US4170722A (en) * 1978-02-17 1979-10-09 Gte Automatic Electric Laboratories, Incorporated Apparatus and method for remote testing of a loop transmission path
JPS55112071A (en) * 1979-02-22 1980-08-29 Nec Corp Dispatching telephone system
US4429391A (en) 1981-05-04 1984-01-31 Bell Telephone Laboratories, Incorporated Fault and error detection arrangement
JPS5854770A (ja) * 1981-09-27 1983-03-31 Sanii Denshi Kk Ｆｍ搬送波式インタ−ホンの通信方式
JPS5863261A (ja) * 1981-10-12 1983-04-15 Nikko Denki Seisakusho:Kk 一斉通話指令装置
US4698501A (en) * 1985-05-16 1987-10-06 Nl Industries, Inc. System for simultaneous gamma-gamma formation density logging while drilling
US5412709A (en) * 1992-06-24 1995-05-02 Charter Leasing Corporation Digital telephone station line controller

Also Published As

Publication number Publication date
US3840706A (en) 1974-10-08
BR7408869D0 (pt) 1975-08-26
AU7341774A (en) 1976-03-25
GB1450978A (en) 1976-09-29
JPS5075303A (fr) 1975-06-20
CA1000880A (en) 1976-11-30
IL45761A0 (en) 1974-12-31
JPS5734715B2 (fr) 1982-07-24
IL45761A (en) 1976-11-30
AR206613A1 (es) 1976-08-06

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